Page 207 - TransAT_Tutorial_Manual

TransAT Tutorial Manual 5.1. Particles in Crossflow

Simulation Parameters Tab
In this tab the numerical parameters of the simulation are defined, such as the type of simulation
to be run, the methods for computing the time step and solving the equations.

• Click Simulation Parameters on the left-hand side

Simulation Type and Control Parameters

• Set up the simulation type and control parameters as the following

• Set the following parameters to solve for an unsteady flow with an implicit method.
Simulation Type : Unsteady

Max number of Time Steps : 500
I n i t i a l Time Step : 1.0 e−3

Max number of i t e r a t i o n s per timestep : 20

• For Time Stepping select Adaptive then click

• Set the following parameters in the Adaptive Time-Stepping window then click to save
the settings and close the window

CFL Limits : Min 0.2 Max 0.4
D i ff u s i o n : Min 0.2 Max 0.4
Fourier Number : Min 1.0 Max 2.0

Equations
The user can define the convergence threshold and the numerical schemes to be used for each
equation in the Equations section.

• Click All Quantities in the equation tree and set the value of the Convergence Tolerance
field as the following

Convergence Tolerance : 1.0 e−3

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Ascomp AG Switzerland 197 Version 5.7